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關(guān)鍵字：主叫識(shí)別 BEL202協(xié)議 FSK MT88E39 單片機(jī) 巡檢
Abstract: The paper mainly descriped the design of eight channel hardware FSK Caller IDcircuit based on single chip microprocessor 。It simultaneously include BEL202 protocole，F(xiàn)SK and computer the parallel communication by dual port RAM technology,and so on.
這個(gè)過(guò)程可用微處理器（如TI 公司的MSP430）及其程序來(lái)實(shí)現(xiàn)，也可由專門的芯片來(lái)完成（本文既是），而后者對(duì)設(shè)計(jì)者來(lái)說(shuō)則顯得很簡(jiǎn)單。
圖1. 8路FSK主叫號(hào)碼接收電路(點(diǎn)擊放大)
3.1硬件電路
圖2a. 主程序流程圖(點(diǎn)擊放大)
4.2程序流程
[1]《Applicaion Report SPRA462--Inplementing Caller ID on Fixed-point DSPS》(（USA）Texas
Instruments Company/網(wǎng)址http://www.ti.com/)
[2]《Caller ID on TMS320C2xx》(（USA）Texas Instruments Company)
[3]《FSK Modulation and Demodulation With the Msp430 Microcontroller》(（USA）Texas
Instruments Company)
[4]《CMOS MT88E39 Calling Number Identifcation Circuit Advance information (CNIC1.1)》（（USA）Mitel
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